Why For- in loop returns 'arg' when loop is empty

Question

I am iterating over the JSON Object

My JSON Structure is something like this

{"someinfo":{"Parameter":{"ABC":"123","xyz":"456"}}}

 for (var tempVal in jsonObj.someinfo.Parameter) {
//print tempval

}

above loop will return correct values when 'Parameter' in JSON is filled.

If it is empty it will print arg

Empty 'Parameter' in JSON will Look Like:

{"someinfo":{"Parameter":""}}}

In order to print correct values when empty or non empty is there any way in for- in loop

Answer 1

filled Parameter is an object empty Parameter is a string

var jsonObj1={"someinfo":{"Parameter":{"ABC":"123","xyz":"456"}}};
var jsonObj2={"someinfo":{"Parameter":""}};
alert("Full: "+typeof jsonObj1.someinfo.Parameter+" ---- Empty: "+typeof jsonObj2.someinfo.Parameter)

you can't "loop in a string" so if you either change your JSON or test it like this

if (typeof jsonObj1.someinfo.Parameter==="object") {
  for (var tempVal in jsonObj.someinfo.Parameter) {
  //print tempval
  }
 } else {
  //empty
}